Just some more teasing that shows the true power of a full Denise in the flickerfixer:
Even if you don't have an ECS Denise, you can use ECS screenmodes with Indivision ECS - it only requires a 1M Chipmem Agnus or higher.
Starting 1990, Commodore delivered computers with what we call "half-ECS" chipsets. This means that the computer already had an ECS Agnus (1M type, switchable between PAL and NTSC), but only an OCS Denise. If you install Indivision ECS in such a system, you can use the ECS modes anyway, such as S-Hires.
The second picture shows that the OCS Denise doesn't display such a mode correctly: It's interpreting the DMA data as a low-res screen and you only see broken graphics.
We're currently testing this in an A500 that has a 2M Chipmem expansion. No software installation is required. It works right out of the box, the computer will identify an ECS Denise, for example if you check SysInfo.
Jens